#3f78ed

Color #3f78ed

A vivid, highly saturated medium blue.

Closest named color Royal Blue #4169e1 · ΔE 7.14 Nearest Tailwind class blue-500 #2b7fff · ΔE 3.3

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#3f78ed

RGB

rgb(63, 120, 237)

HSL

hsl(220.3, 82.9%, 58.8%)

HSV / HSB

hsv(220.3, 73.4%, 92.9%)

CMYK

cmyk(73.4%, 49.4%, 0%, 7.1%)

LAB

lab(52.51, 20.93, -64.44)

LCH

lch(52.51, 67.75, 287.99)

OKLCH

oklch(59.8%, 0.1867, 262.62)

HWB

hwb(220.3, 24.7%, 7.1%)

Harmony colors

Complementary

#edb43f

Analogous

#3fcfed

#3f78ed

#5d3fed

Triadic

#3f78ed

#ed3f78

#78ed3f

Split-complementary

#3f78ed

#ed5d3f

#cfed3f

Tetradic

#3f78ed

#b43fed

#edb43f

#78ed3f

Square

#3f78ed

#ed3fcf

#edb43f

#3fed5d

Shades

Color #3f78ed mixed toward black.

#1559e5

#1148b7

#0d3689

#09245b

#04122e

Tints

Color #3f78ed mixed toward white.

#5f8ff0

#7fa5f3

#9fbcf6

#bfd2f9

#dfe9fc

Tones

Color #3f78ed mixed toward gray.

#4d7ddf

#5c82d0

#6a87c1

#798cb3

#8791a4

Accessibility

Aa White text on this color

4.1:1

Aa Black text on this color

5.12:1

Black text reads better on this background (5.12:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#5d5ed8 · ΔE 10.9

Deuteranopia

#5a55d3 · ΔE 13.6

Tritanopia

#43c5c1 · ΔE 37.3

Achromatopsia

#7d7d7d · ΔE 26.9

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #3f78ed;

Tailwind (arbitrary value)

bg-[#3f78ed]

Related colors

Cornflower Blue #6495ed

Royal Blue #4169e1

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#3f78ed (#3f78ed) is rgb(63, 120, 237) in RGB.

No, #3f78ed is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #3f78ed, or check how it holds up for accessibility.

Generate a palette → Check contrast